How do I listen to changes in MongoDB?

Open a Change Stream. You can watch for changes to a single collection, a database, or an entire deployment in MongoDB with Change Streams. Open a change stream by calling the watch() method on a Collection , Db , or MongoClient object . The change stream emits change event documents when they occur.

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Is MongoDB free to use?

Is MongoDB Free? You can get started with a MongoDB developer sandbox in MongoDB Atlas for free with basic configuration options . No credit cards are required to provision a cluster, and you can use it to explore and learn more about MongoDB Atlas, the database-as-a-service platform from MongoDB.

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